# Item List to Booleans by contents of other list

**URL:** <https://forum.dynamobim.com/t/item-list-to-booleans-by-contents-of-other-list/94778>\
**Category:** Lists-Logic\
**Tags:** revit, dynamo\
**Created:** [October 21, 2023, 7:39am UTC](https://forum.dynamobim.com/t/item-list-to-booleans-by-contents-of-other-list/94778 "2023-10-21T07:39:23Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Andrej](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/andrej/32/172909_2.png) [@Andrej](https://forum.dynamobim.com/u/Andrej)\
**Post date:** [October 21, 2023, 7:39am UTC](https://forum.dynamobim.com/t/item-list-to-booleans-by-contents-of-other-list/94778/1 "2023-10-21T07:39:23Z")

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I have two lists.

The first list is the one I want to inspect:

![1](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/a/5/a5e38457c33ea6eb71f5b4ce26b0c96b6546d654.jpeg)

by contents of the second list:

![2](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/9/e/9ed1ff09ed4899dc0989d476456eb307a86581a9.jpeg)

I want to get this:

![3](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/5/d/5d9c32cbef12e5f42f98dfbf5b3a5968bf8d0209.jpeg)

How?

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**Author:** ![sovitek](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/sovitek/32/116237_2.png) [@sovitek](https://forum.dynamobim.com/u/sovitek)\
**Post date:** [October 21, 2023, 8:10am UTC](https://forum.dynamobim.com/t/item-list-to-booleans-by-contents-of-other-list/94778/2 "2023-10-21T08:10:11Z")

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Hi @Andrej probably something here could work…

arh edit 😉 didnt check how you want the list 😉  
something here instead…

 ![Skærmbillede 2023-10-21 101844](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/1/c/1cd02fc42580c8fbd6ad35548de04e75a9573611.png)

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**Author:** ![Andrej](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/andrej/32/172909_2.png) [@Andrej](https://forum.dynamobim.com/u/Andrej)\
**Post date:** [October 23, 2023, 8:47am UTC](https://forum.dynamobim.com/t/item-list-to-booleans-by-contents-of-other-list/94778/3 "2023-10-23T08:47:40Z")

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Thanks. Could you point me to some resource that explains node levels?

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**Author:** ![sovitek](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/sovitek/32/116237_2.png) [@sovitek](https://forum.dynamobim.com/u/sovitek)\
**Post date:** [October 23, 2023, 9:22am UTC](https://forum.dynamobim.com/t/item-list-to-booleans-by-contents-of-other-list/94778/4 "2023-10-23T09:22:14Z")

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yeah…try take a look here, or just play around with it until you finf out whats goin on 😉

> **[Lists of Lists](https://primer2.dynamobim.org/5_essential_nodes_and_concepts/5-4_designing-with-lists/3-lists-of-lists)**

[![](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/e/b/ebba691490fee76db83cf843d89c6ef687d2d3d6.jpeg "Understanding list levels in Dynamo!") ](https://www.youtube.com/watch?v=b46Iiwt15h0)

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**Author:** ![Andrej](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/andrej/32/172909_2.png) [@Andrej](https://forum.dynamobim.com/u/Andrej)\
**Post date:** [October 23, 2023, 9:22am UTC](https://forum.dynamobim.com/t/item-list-to-booleans-by-contents-of-other-list/94778/5 "2023-10-23T09:22:54Z")

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ty